A sampling method of passive diffusion tube for collecting formaldehyde in indoor air was established.
本文建立了被动式扩散管采集室内空气中甲醛的方法。
This paper mainly introduces structure and prinicipe of mouth bulging die for diffusion tube, calculation method of blank size and forming force, design technology of main work parts.
主要介绍扩散管胀口模具的结构与工作原理、毛坯尺寸及胀口力计算方法和主要工作部件的设计技术。
The results show that oxidizing mechanism of the heater tube is mainly diffusion of metal ion passing through oxide and its reaction at the oxide-gases boundary.
结果表明，炉管的氧化机理主要是金属离子穿过氧化物层的扩散并在氧化物—气体界面发生反应。
The antibacterial properties of leaf extracts from Phyllostachys pubescens with the method of tube and disc diffusion was studied.
应用管碟扩散法对毛竹叶提取物的抑菌作用进行初步研究。
Based on molecular diffusion model of water vapor a theoretical model of frost growth is established and an experimental set with a liquid nitrogen cooled tube is built up.
以蒸汽分子扩散模型为基础，建立了预测霜层生长过程的数学模型，并建立了以液氮为冷媒的管内强制流动结霜实验台。
A new detection tube for formaldehyde gas based on passive sampling has been developed according to the principle of the gas molecular diffusion and chemical adsorption.
新研制的甲醛被动式检气管是建立在气体分子扩散和化学吸收原理基础上的。
For avoiding the diffusion of the gas containing bacteria in the tube of the respiration apparatus to pollute the air in ward and make the cross-infection.
为防止呼吸机呼气管道中的含菌气体扩散污染病房空气，引发交叉感染。
If the gas mixture in the tube is stagnant, the transfer occurs by molecular diffusion.
如果管中的混合气体是不流动的，那么传递就通过分子扩散来进行。
Taking account of the disadvantage of current P-type impurity diffusion technology, an open tube gallium-aluminium diffusion technology is investigated.
就现行P型杂质扩散工艺的不足，进行了开旮铝镓掺杂技术的研究。
The bactericidal tests of L forms were performed by paper diffusion method and tube dilution method.
采用纸片法和试管法对细菌L型进行杀菌试验。
The bactericidal tests of L forms were performed by paper diffusion method and tube dilution method.
采用纸片法和试管法对细菌L型进行杀菌试验。
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